TY  - BOOK
AU  - Natonal Science Foundaton, USA
TI  - Non conventional technical information systems in current use , no 2
PY  - 1959///
CY  - US Government Printing Office
PB  - Washington DC
UR  - http://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=3250
ER  -